An 8-month-old needs 12 to 16 hours of total sleep per day, including nighttime sleep and naps. Most of that sleep happens at night, with the remaining 2.5 to 3.5 hours spread across two daytime naps. That’s the target range, but hitting it consistently can be tricky at this age because so many developmental changes are happening at once.
Nighttime Sleep and Nap Breakdown
At 8 months, your baby should be taking two naps per day. Those naps combined should total roughly 2.5 to 3.5 hours, with no single nap running longer than about 2 hours. If one nap stretches too long, it can push bedtime later or make the second nap harder to achieve.
The remaining sleep, typically 10 to 12 hours, happens overnight. Many 8-month-olds are capable of sleeping longer stretches at night, though waking once or twice is still common. The exact split between day and night sleep varies from baby to baby. Some lean toward the higher end of the range (closer to 15 or 16 hours total), while others function well on 12 to 13.
Wake Windows Between Naps
The stretches of awake time between sleep periods matter as much as the sleep itself. At 8 months, wake windows typically range from 2.5 to 3.5 hours. Getting these right helps your baby fall asleep more easily and stay asleep longer.
A common pattern looks like this: your baby wakes in the morning and stays up for about 2.5 to 3 hours before the first nap. After that nap, they stay awake for roughly 3 hours before the second nap. Then the longest wake window of the day, about 3 to 3.5 hours, comes between the second nap and bedtime. Some babies handle the longer end of these windows easily, while others get overtired quickly and need the shorter end. Watch for signs like eye rubbing, fussiness, or zoning out to gauge what works for your child.
The 8-Month Sleep Regression
If your baby was sleeping well and suddenly isn’t, you’re likely experiencing the 8-month sleep regression. This is one of the more disruptive regressions because so many developmental changes pile up at once.
Around this age, many babies are learning to crawl, pull to a stand, and sit up independently. These new physical abilities can make them restless in the crib, and some babies will practice their new skills in the middle of the night instead of sleeping. Teething is often underway too, adding fussiness and nighttime wakings to the mix.
The emotional side is just as significant. Separation anxiety commonly starts or intensifies around 8 months. Your baby’s awareness of their surroundings is growing, and they may cry or become upset when you leave the room, including at bedtime. This isn’t a behavioral problem. It’s a normal sign that their brain is developing stronger attachments and a better understanding of object permanence (knowing you still exist when you’re out of sight).
Sleep regressions are temporary. They typically last a few weeks, and maintaining consistent sleep habits during this stretch helps your baby come out the other side more smoothly.
Building a Bedtime Routine
A predictable bedtime routine signals to your baby that sleep is coming. It doesn’t need to be elaborate. About 20 minutes of calming activities in the same order each night is enough. A bath, a story or two, a cuddle, and a kiss goodnight works well. The key is consistency: same activities, same sequence, same approximate time each evening.
When the routine is finished, let your baby know it’s time for sleep. That means no more stories, talking, or interaction. Say goodnight, turn out the main light, and leave the room. Keeping bedtime at roughly the same time each night reinforces your baby’s internal clock, which makes falling asleep easier over time.
Night Feedings at 8 Months
Whether your baby still needs to eat overnight depends partly on how they’re fed. Formula-fed babies over 6 months are generally getting enough calories during the day and are unlikely to wake from genuine hunger. Nighttime wakings at this age are more often about comfort, habit, or developmental disruptions than nutritional need.
For breastfed babies, the picture is a bit different. Breastmilk digests faster than formula, and reducing night feeds before 12 months can lower your milk supply. If you’re breastfeeding and your baby still wakes to nurse, that’s normal and doesn’t necessarily need to change yet. If you’re considering dropping a night feed, doing it gradually and after 12 months is the gentler approach for both your supply and your baby.
Setting Up a Safe Sleep Space
At 8 months, your baby can likely roll, sit up, and possibly pull to a stand. That mobility changes what a safe sleep environment looks like compared to the newborn days.
Lower the crib mattress so your baby can’t climb or fall over the rail. If you still have a mobile hanging above the crib, take it down once your baby can sit up, since they can grab it and pull it loose. Place the crib away from windows and at least an arm’s reach from any dressers, shelves, or tabletops your baby could grab.
The basics of safe sleep still apply: a firm, flat mattress with a fitted sheet and nothing else in the crib. No loose blankets, pillows, stuffed animals, or bumper pads. Your baby should sleep on their back in their own sleep space rather than on a couch, armchair, or in a swing or car seat (unless they’re actually riding in the car).
Room Temperature for Better Sleep
The recommended room temperature for a sleeping baby is 60 to 68°F (16 to 20°C). Keeping the room within this range reduces the risk of overheating, which is a risk factor for SIDS. If you run the heat overnight, set it no higher than 68°F. A good rule of thumb: if the room feels comfortable to you in a light layer, it’s probably fine for your baby dressed in a sleep sack or footed pajamas.